azhenley / hofstadter Goto Github PK

In the above lines from the interpreter, the symbol for console io is denoted by #. Either the documentation should be updated to reflect that or the interpreter should be updated to be consistent with the documentation.

Error:

Traceback (most recent call last):
  File "/home/cade/programs/hofstadter/hofstadter.py", line 221, in <module>
    evaluator = Evaluator([Line(x) for x in rawlines])
  File "/home/cade/programs/hofstadter/hofstadter.py", line 221, in <listcomp>
    evaluator = Evaluator([Line(x) for x in rawlines])
  File "/home/cade/programs/hofstadter/hofstadter.py", line 17, in __init__
    self.tokenize()
  File "/home/cade/programs/hofstadter/hofstadter.py", line 23, in tokenize
    t = self.nextToken()
  File "/home/cade/programs/hofstadter/hofstadter.py", line 76, in nextToken
    while not self.text[self.index].isspace() or escaped and self.index < length:
IndexError: string index out of range

https://github.com/AZHenley/hofstadter/blob/main/hofstadter.py#L76 has the conditional checks out of order, it change from:

            while not self.text[self.index].isspace() or escaped and self.index < length:

to:

            while self.index < length and not self.text[self.index].isspace() or escaped:

Most useful programs written in hofstadter will likely need some setup and cleanup utilities -- adding a __name__ check would allow for programmers to 'elegantly' import hofstadter into a python script which encompasses setup, execution, and cleanup.

In the documentation, it is stated that ; represents the Console IO character. In the source code, hofstader.py lines 39-41 tokenize # as the "stdin/stdout" token. As such, current evaluation computes ; as a filename. Either the documentation should be updated to reflect that # is the appropriate operator, or the code should be changed to evaluate ; as the console operator.